Occitan is a redirect to this article. For other meanings, see Occitan (disambiguation).

Occitan (Occitan [utsiˈtɒ] / lenga d'òc [lɛŋgoˈdɔ], French occitan/langue d'oc) is the second Gallo-Romance language after French, which developed in former Gaul from Vulgar Latin. The varieties (dialects) of Occitan, which unlike French does not have a unified, supra-regional written language, are spoken mainly in the southern third of France and other smaller areas. These include, on the territory of Spain, the northwestern Catalan region of Val d'Aran and, in northern Italy, some Piedmontese Alpine valleys, as well as linguistic islands created by emigration in southern Italy (Guardia Piemontese), in North America (Valdese in North Carolina), and in South America (Colonia Valdense in Uruguay). In the Waldensian settlements of southern Germany, Occitan language islands disappeared in the 20th century.

Occitan is recognised as an official language only in Catalonia (along with Castilian and Catalan) - in its variant there, Aranese from the Val d'Aran. In France, (Northern) French has been the sole official language since 1539, while Occitan is only one of the regional or minority languages recognised, with some restrictions, by the French State in 1999, in accordance with the European Charter for Regional or Minority Languages.